PubChem Search and explore chemical information in the world's largest free chemistry database Search chemicals by name, molecular formula, structure, and other identifiers
Chemistry - Wikipedia Chemical reactions usually involve the making or breaking of chemical bonds Oxidation, reduction, dissociation, acid–base neutralization and molecular rearrangement are some examples of common chemical reactions
What Is a Chemical? Definition and Examples A chemical is any substance with a definite composition and distinct properties All matter is made of chemicals, regardless of whether it is natural or synthetic
Recap: Garden Grove chemical tank emergency – NBC Los Angeles Residents in Garden Grove face a rising threat from an unstable toxic chemical tank that firefighters say appears likely to leak its contents or explode Follow below for live updates
CHEMICAL Definition Meaning - Merriam-Webster The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry How to use chemical in a sentence
Periodic Table of Elements - PubChem Interactive periodic table with up-to-date element property data collected from authoritative sources Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or even test your elements knowledge by playing a periodic table game!
Substance (chemistry) - Wikipedia In chemistry, a substance is a unique form of matter with constant chemical composition and characteristic properties [1][2] Chemical substances may take the form of a single element or chemical compounds